arch/sh/include/asm/clock.h

   1 #ifndef __ASM_SH_CLOCK_H
   2 #define __ASM_SH_CLOCK_H
   3
   4 #include <linux/list.h>
   5 #include <linux/seq_file.h>
   6 #include <linux/cpufreq.h>
   7 #include <linux/clk.h>
   8 #include <linux/err.h>
   9
  10 struct clk;
  11
  12 struct clk_ops {
  13         void (*init)(struct clk *clk);
  14         int (*enable)(struct clk *clk);
  15         void (*disable)(struct clk *clk);
  16         unsigned long (*recalc)(struct clk *clk);
  17         int (*set_rate)(struct clk *clk, unsigned long rate, int algo_id);
  18         int (*set_parent)(struct clk *clk, struct clk *parent);
  19         long (*round_rate)(struct clk *clk, unsigned long rate);
  20 };
  21
  22 struct clk {
  23         struct list_head        node;
  24         const char              *name;
  25         int                     id;
  26
  27         struct clk              *parent;
  28         struct clk_ops          *ops;
  29
  30         struct list_head        children;
  31         struct list_head        sibling;        /* node for children */
  32
  33         int                     usecount;
  34
  35         unsigned long           rate;
  36         unsigned long           flags;
  37
  38         void __iomem            *enable_reg;
  39         unsigned int            enable_bit;
  40
  41         unsigned long           arch_flags;
  42         void                    *priv;
  43         struct dentry           *dentry;
  44         struct cpufreq_frequency_table *freq_table;
  45 };
  46
  47 #define CLK_ENABLE_ON_INIT      (1 << 0)
  48
  49 /* Should be defined by processor-specific code */
  50 void __deprecated arch_init_clk_ops(struct clk_ops **, int type);
  51 int __init arch_clk_init(void);
  52
  53 /* arch/sh/kernel/cpu/clock.c */
  54 int clk_init(void);
  55 unsigned long followparent_recalc(struct clk *);
  56 void recalculate_root_clocks(void);
  57 void propagate_rate(struct clk *);
  58 int clk_reparent(struct clk *child, struct clk *parent);
  59 int clk_register(struct clk *);
  60 void clk_unregister(struct clk *);
  61
  62 /* arch/sh/kernel/cpu/clock-cpg.c */
  63 int __init __deprecated cpg_clk_init(void);
  64
  65 /* the exported API, in addition to clk_set_rate */
  66 /**
  67  * clk_set_rate_ex - set the clock rate for a clock source, with additional parameter
  68  * @clk: clock source
  69  * @rate: desired clock rate in Hz
  70  * @algo_id: algorithm id to be passed down to ops->set_rate
  71  *
  72  * Returns success (0) or negative errno.
  73  */
  74 int clk_set_rate_ex(struct clk *clk, unsigned long rate, int algo_id);
  75
  76 enum clk_sh_algo_id {
  77         NO_CHANGE = 0,
  78
  79         IUS_N1_N1,
  80         IUS_322,
  81         IUS_522,
  82         IUS_N11,
  83
  84         SB_N1,
  85
  86         SB3_N1,
  87         SB3_32,
  88         SB3_43,
  89         SB3_54,
  90
  91         BP_N1,
  92
  93         IP_N1,
  94 };
  95
  96 struct clk_div_mult_table {
  97         unsigned int *divisors;
  98         unsigned int nr_divisors;
  99         unsigned int *multipliers;
 100         unsigned int nr_multipliers;
 101 };
 102
 103 struct cpufreq_frequency_table;
 104 void clk_rate_table_build(struct clk *clk,
 105                           struct cpufreq_frequency_table *freq_table,
 106                           int nr_freqs,
 107                           struct clk_div_mult_table *src_table,
 108                           unsigned long *bitmap);
 109
 110 long clk_rate_table_round(struct clk *clk,
 111                           struct cpufreq_frequency_table *freq_table,
 112                           unsigned long rate);
 113
 114 int clk_rate_table_find(struct clk *clk,
 115                         struct cpufreq_frequency_table *freq_table,
 116                         unsigned long rate);
 117
 118 #define SH_CLK_MSTP32(_parent, _enable_reg, _enable_bit, _flags)        \
 119 {                                                                       \
 120         .parent         = _parent,                                      \
 121         .enable_reg     = (void __iomem *)_enable_reg,                  \
 122         .enable_bit     = _enable_bit,                                  \
 123         .flags          = _flags,                                       \
 124 }
 125
 126 int sh_clk_mstp32_register(struct clk *clks, int nr);
 127
 128 #define SH_CLK_DIV4(_parent, _reg, _shift, _div_bitmap, _flags) \
 129 {                                                               \
 130         .parent = _parent,                                      \
 131         .enable_reg = (void __iomem *)_reg,                     \
 132         .enable_bit = _shift,                                   \
 133         .arch_flags = _div_bitmap,                              \
 134         .flags = _flags,                                        \
 135 }
 136
 137 struct clk_div4_table {
 138         struct clk_div_mult_table *div_mult_table;
 139         void (*kick)(struct clk *clk);
 140 };
 141
 142 int sh_clk_div4_register(struct clk *clks, int nr,
 143                          struct clk_div4_table *table);
 144 int sh_clk_div4_enable_register(struct clk *clks, int nr,
 145                          struct clk_div4_table *table);
 146 int sh_clk_div4_reparent_register(struct clk *clks, int nr,
 147                          struct clk_div4_table *table);
 148
 149 #define SH_CLK_DIV6(_parent, _reg, _flags)      \
 150 {                                               \
 151         .parent = _parent,                      \
 152         .enable_reg = (void __iomem *)_reg,     \
 153         .flags = _flags,                        \
 154 }
 155
 156 int sh_clk_div6_register(struct clk *clks, int nr);
 157
 158 #endif /* __ASM_SH_CLOCK_H */